samexaxis (nice subplots with same x axis)

Makes it alot easier to make nice figures with the same x axis.

Features:

* Automatically sets xlim to the same for all subplots Removes xticklabels where it is not needed.
* Can join a subplots (if it is made with subplot instead of subaxis)
* Can set the ylabel position to the same for all subplots
* Can almost allways avoid that the yticklabels are written on top of each other
* Can automatically add a),b),c) to each subplot

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% helper function to clean up subplots that have common x axises

USAGE: samexaxis([optionalarguments])

Optional arguments:
* YAxisLocation (default='left') : choose left,right, alternate or alternate2
* XAxisLocation (default='bottom') : choose bottom,top or both
* YLabelDistance (default=1.4)
* Box (default='on')
* XTick
* XTickLabel
* XMinorTick
* ABC : add a),b),c), ... to each sub plot
* Join: joins the subplots vertically
* YTickAntiClash: try to aviod yticklabel clashes (default=false)


Example:
subplot(3,1,1);
plot(randn(100,1),randn(100,1),'x');
ylabel('QF')
subplot(3,1,2);
plot(randn(100,1),randn(100,1)*10,'x');
ylabel('HT');
subplot(3,1,3);
plot(randn(100,1),randn(100,1)*33,'x');
ylabel('DV');

samexaxis('abc','xmt','on','ytac','join','yld',1)